Hi there, we apologize for any confusion with your recent purchase of the Rotary 16401 Pump Drive Belt. We understand that you were expecting a notched belt, but please know that the new belt, part number 607400, has replaced the old part number 603907 and is not notched. Rest assured, the notches do not affect the performance of the belt in any way. If you have any further questions or concerns, please don't hesitate to reach out to us. Thank you for choosing our product.

Hi there, we apologize for any confusion with your recent purchase of the Rotary 16401 Pump Drive Belt. We understand that you were expecting a notched belt, but please know that the new belt, part number 607400, has replaced the old part number 603907 and is not notched. Rest assured, the notches do not affect the performance of the belt in any way. If you have any further questions or concerns, please don't hesitate to reach out to us. Thank you for choosing our product.